I was thinking of installing one so I could turn it off and on at will (to prevent car theft). Like when I park in a bad area.

My question is if there is any negative effects that can be had by this? I run an MSD coil and MSD6AL. Can these units be damaged in any way by the constant on/off of the ignition system?
Thanks

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91 Formula
305 TPI 5speed
1LE/G92/WS6
Custom cold air intake w/K&N, SLP airfoil, ported plenum, TB coolant bypass,Crane AFPR (47psi),94 octane,Crane Extruded Alum. 1.6 full roller rockers, Timing set from 4*BTDC to 10*BTDC,MSD6AL, Holley 9mm Annihilator Laser shot 50 wires, Ac Delco cap,rotor and plugs, Bosch O2sensor, SLP 1 5/8 headers,SLP catback,3:73s,JET 195* fan switch, Macewen white face gauges, Autometer gauges, Zoom hi-performance clutch.
Street legal with stock throttle body, runners,intake manifold,cam, and heads. Coming next..9# Procharger!

 

Just put a switch on one of the 12V input.
I would put it on the negative side, but i don't think it would matter.
I havent tried anything like this so this is my 2 cents.